import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import User from '../components/user/User.vue'
Vue.use(VueRouter)

const routes = [
  {
    path: "/",
    redirect: '/login'

  },
  {
    path: "/login",
    component: Login
  },
  {
    path: "/home",
    component: Home,
    redirect: '/welcome',
    children: [
      {
        path: "/welcome"
        , component: Welcome
      },
      {
        path: "/users"
        , component: User
      },

    ]
  },

]

const router = new VueRouter({
  routes
})

router.beforeEach((to, from, next) => {
  // to 将要访问的路径   
  // from 代表从哪个路径跳转而来
  //next 是一个函数 表示方形 
  if (to.path === '/login') return next()
  //获取token
  const token = window.sessionStorage.getItem('token')
  if (!token) return next('/login')
  next()
})



export default router
